Diversitech TR40VA004 Control Transformer 40VA 120-277V 24V

Product Description

The DIVERSITECH TR40VA004 is a single-phase control transformer rated at 40 VA, designed to step down a wide-range primary voltage of 120 to 277 volts to a stable 24 VAC secondary output. Wire lead connections keep installation straightforward, and multiple mounting configurations — including foot mount and dual threaded hub — allow flexible positioning in tight enclosures or standard junction boxes. This transformer is commonly installed by licensed HVAC technicians and electricians who need reliable low-voltage control power in commercial and residential applications.

This transformer is suited for HVAC control circuits, zone valve systems, thermostat wiring, and general electrical distribution panels where a 24 VAC control signal is required. Its wide primary voltage range makes it compatible with both standard 120-volt residential service and higher 208-volt or 277-volt commercial branch circuits, reducing the need to stock multiple transformer variants on a service vehicle.

Key Features

• 40 VA capacity supports typical HVAC control loads including contactors and relays
• Wide primary voltage range: 120 to 277 volts single-phase
• 24 VAC secondary output for low-voltage control circuits
• Wire lead connections for straightforward field wiring
• Foot mount and dual threaded hub mounting options for flexible installation

Compatibility

Designed as an OEM-style replacement control transformer for residential and light commercial HVAC control circuits requiring a 24 VAC output from a 120 to 277 volt single-phase primary source.

Installation Notes

Installation should be performed by a licensed electrician or HVAC technician in accordance with NEC requirements and local codes. Disconnect and lock out all primary power before handling or wiring the transformer. Verify that the available supply voltage falls within the 120 to 277 volt primary range before connecting. Ensure the secondary load does not exceed the 40 VA rating to prevent overheating or nuisance trips.

Technical Specifications

• Capacity: 40 VA
• Primary Voltage: 120 to 277 volts
• Secondary Voltage: 24 volts AC
• Phase: Single-phase
• Connection Type: Wire leads
• Mounting Options: Foot mount, dual threaded hub

Standard Information

• Brand: DIVERSITECH
• Manufacturer Part Number: TR40VA004